Mapreduce jobs are hanging(Hive imports/select count from table) On ITversity Labs


I am going through course CCA 175.
Currently on topic: Hive imports

Jobs are hanging for Select count(1) for order items;

	sqoop import \
--connect jdbc:mysql:// \
--username retail_user \
--password itversity \
--table order_items \
--hive-import \
--hive-database vaibhavdesai_sqoop_import \
--hive-table order_items \
--hive-overwrite \
--num-mappers 2

Killing the application from tracker


The issue is resolved.
Had to kill applications in between.
Now its running queries and import jobs.

Kindly let me know troubleshooting steps atleast what to check and observe if not restarts and all since I am not admin on your labs.
Your inputs will help as a good information to know.
For eg: on forums, saw restart zookeeper.